[GaryEM]

The rise in the inflation in 2004 through 2006 was mostly attributable to the rise of:
- social expenditures of the budget compared to goods offer.
- housing and utilities infrastructure rate.
- grocery output costs, heating systems and city transport infrastructure stimulated by fuel and oil price rising.
(Choose economic terms, but I think cost of food is your intent.)
Most of employed population accounting for 60% is involved in business,
nearly 27% working on enterprises and organizations owned by the
(Sixty percent of the employed population is involved in business, while nearly twenty seven percent works on enterprises... )
government or a city. The rest population is working at companies with foreign investments or joint companies. Nearly 0.6 million of people are working in small-size businesses.
(The difference between "business" and "companies with foreign investments or joint companies" is not clear. Do you want to discuss domestic and foreign business?)

Unemployment rate, measured in accordance with the International Labor Organization standards, was 150 thousands of people. 17.3 thousands of people are registered for Placement service. By 2009, based on predictions the two figures will rose within 12%.
(simple future tense : figures will rise
what is meaning of "within"? if the increase is 12% , we say "will rise by 12%" if we expect less than 12 % we say "nearly 12%" )
Over the last years Saint-Petersburg has strengthened its position as the
(Years is a counting noun. How many years? We use numbers, and we use words like "couple of", "few", "several", and "many" . Your phrase suggests a small number, less than ten. You need to use "Over the last counting word years." Do not use "counting word". Replace with correct word.)
financial center in North-West of Russia. By the number of lending organizations the city is ranked second in the Russian Federation behind Moscow. Ended 2007, 50 lending organizations are operating in the city, notably: (43 banks, 7 loan associations), 114 offices of Banks based in other cities and 24 foreign banks.
(parenthesis not necessary (43 banks, 7 loan associations.) just omit parenthesis. all words correct.)